35 Seasons of U.S. Antarctic Meteorites (1976-2010): A Pictorial Guide To The Collection (Special Publications)
Kevin Righter
Language: English
Pages: 320
ISBN: 1118798325
Format: PDF / Kindle (mobi) / ePub
The US Antarctic meteorite collection exists due to a cooperative program involving the National Science Foundation (NSF), the National Aeronautics and Space Administration (NASA), and the Smithsonian Institution. Since 1976, meteorites have been collected by a NSF-funded field team, shipped for curation, characterization, distribution, and storage at NASA, and classified and stored for long term at the Smithsonian. It is the largest collection in the world with many significant samples including lunar, martian, many interesting chondrites and achondrites, and even several unusual one-of-a-kind meteorites from as yet unidentified parent bodies. Many Antarctic meteorites have helped to define new meteorite groups.
No previous formal publication has covered the entire collection, and an overall summary of its impact and significant samples has been lacking. In addition, available statistics for the collection are out of date and need to be updated for the use of the community. 35 seasons of U.S. Antarctic Meteorites (1976-2011): A Pictorial Guide to the Collection is the first comprehensive volume that portrays the most updated key significant meteoritic samples from Antarctica.
35 seasons of U.S. Antarctic Meteorites presents a broad overview of the program and collection nearly four decades after its beginnings. The collection has been a consistent and reliable source of astromaterials for a large, diverse, and active scientific community.
Volume highlights include:
• Overview of the history, field practices, curation approaches
• Special focus on specific meteorite types and the impact of the collection on understanding these groups (primitive chondrites, differentiated meteorites, lunar and martian meteorites)
• Role of Antarctic meteorites in influencing the determination of space and terrestrial exposure ages for meteorites
• Statistical summary of the collection by year, region, meteorite type, as well as a comparison to modern falls and hot desert finds
• The central portion of the book features 80 color plates each of which highlights more influential and interesting samples from the collection.
35 seasons of U.S. Antarctic Meteorites would be of special interest to a multidisciplinary audience in meteoritics, including advanced graduate students and geoscientists specializing in mineralogy, petrology, geochemistry, astronomy, near-earth object science, astrophysics, and astrobiology.
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That they are impact melt breccias that do not preserve their primary textures [Van Nierkirk and Keil, 2011]. This interpretation is based on the occurrence of euhedral enstatite in opaque mineral assemblages, the presence of the mineral keilite (Fe, Mg)S, and possible evidence for mobilization of metal. Rubin [1997] found euhedral, zoned sinoite grains associated with euhedral enstatite and graphite within impact-melted portions of QUE 94368, the first known EL4 chondrite (Plate 32). He.
0.60 4.35 4.30 4.25 1 cm PAT 91501 4.20 0.0 K/Ca PAT91501 0.30 [k] = 935 ppm,[Ca] = 1.6% 0.2 0.4 0.6 0.8 39Ar cumulative fraction 0.00 1.0 Plate 8 Mineralogy Significance PAT 91501 shows an equigranular (~0.4 mm grain size) aggregate of anhedral to subhedral olivine (Fa24) and low-Ca pyroxene (Fs20), with minor plagioclase (An12) and accessory nickel-iron and troilite. Plagioclase laths are larger than olivine and pyroxene (up to 3 mm long) and poikilitically enclose these minerals.
(dunite) material preserved in the parent body as well. Therefore, many meteoriticists have looked carefully for dunitic material among achondrites that may come from the HED parent body. A handful of dunitic HEDs have been recognized, one of which is Miller Range 03443. 75 MIL 03443 (a) Olivine MIL 03443 Diogenites1 Diogenite Cpx inclusions 65 ,3 55 ,0 45 ,1 Mesosiderites2 FeO/MnO (wt.%) 35 25 40 0 10 20 30 40 50 (b) Pyroxene Large opx grains in MIL 35 30 Cpx inclusions in 25.
Ehrenfreund (2007), Amino acids in Antarctic CM1 meteorites and their relationship to other carbonaceous chondrites, Meteorit. Planet. Sci. 42, 81–92. [65] Busemann H., C. M. O’D. Alexander, and L. R. Nittler (2007), Characterization of insoluble organic matter in meteorites by Raman spectroscopy, Meteorit. Planet. Sci., 42, 1387–1416. [66] Howard, K. T., G. K. Benedix, P. A. Bland, and G. Cressey (2011), Modal mineralogy of CM chondrites by X-ray diffraction (PSD-XRD): Part 2. Degree, nature.
Mittlefehldt (2010), Low-degree partial melting experiments of CR and H chondrite compositions: Implications for asteroidal magmatism recorded in GRA 06128 and GRA 06129, Lunar Planet. Sci. Conf., 41, LPI Contribution No. 1533, 1186. [367] Zeigler, R. A., B. L. Jolliff, R. L. Korotev , D. Rumble, P. K. Carpenter, A. Wang (2008), Petrology, geochemistry, and likely provenance of unique achondrite Graves Nunataks 06128, Lunar Planet. Sci. Conf., 39, LPI Contribution No. 1391, 2456. 50. ALH.